A volcanologist from the Alaska Volcano Observatory inspects an impact crater (left-foreground) formed by a dense block ejected during the 18 August 1992 eruption of the Crater Peak vent on Mount Spurr. Pyroclastic flow and lahar deposits from that eruption form the darker areas descending SE-flank valleys. This 1993 view looking away from Spurr shows glacier-covered plutonic and sedimentary rocks of the Alaska Range in the background.

Photo by Christina Neal, 1992 (Alaska Volcano Observatory, U.S. Geological Survey).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Fieldwork | Ballistic Ejecta

Keywords: block | ejecta | impact crater | volcanologist | field work | ballistic ejecta | deposit

Spurr